Evaluation of citrus rootstock response to HLB in large-scale existing field trials

Evaluation of citrus rootstock response to HLB in large-scale existing field trials

Report Date: 07/08/2020
Project: 18-029C   Year: 2020
Category: Plant Improvement
Author: Ute Albrecht
Sponsor: Citrus Research and Development Foundation

  1. Please state project objectives and what work was done this quarter to address them: Objective 1. Investigate rootstock effects on horticultural performance of Valencia and Hamlin trees commercially grown under HLB-endemic conditions using standardized field data collection procedures.Tree growth measurements were completed in all four trials using standard procedures. Valencia harvest data and fruit quality data were received, and most of the statistical analyses were completed. Objective 2. Develop outreach to transfer information to growers and other industry clientele.A Citrus Industry magazine article was submitted for the July 2020 issue. The article summarized the most recent data from the Hamlin trials and the previous season’s data from the Valencia trials (this season’s data were not available at the time of article submission).   2. Please state what work is anticipated for next quarter: We will collect leaf samples in all  trials for leaf nutrient analysis. This year’s Valencia data will be summarized for a virtual/recorded presentation at the Citrus Expo. In addition, a student presentation will be given at the ASHS conference in August (to be held virtually).   3. Please state budget status (underspend or overspend, and why): Approximately 45% of funds have been spent, which is mostly in accord with the timeline. Some funds could not be spent as fruit harvest and quality analysis had to be outsourced due to the covid-19 imposed research halt.  


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